#include "bus-internal.h"
#include "bus-type.h"
#include "bus-signature.h"
+#include "bus-gvariant.h"
static int message_append_basic(sd_bus_message *m, char type, const void *p, const void **stored);
free(m);
}
-static void *message_extend_fields(sd_bus_message *m, size_t align, size_t sz) {
+static void *message_extend_fields(sd_bus_message *m, size_t align, size_t sz, bool add_offset) {
void *op, *np;
size_t old_size, new_size, start;
m->free_header = true;
+ if (add_offset) {
+ if (m->n_header_offsets >= ELEMENTSOF(m->header_offsets))
+ goto poison;
+
+ m->header_offsets[m->n_header_offsets++] = new_size - sizeof(struct bus_header);
+ }
+
return (uint8_t*) np + start;
poison:
assert(m);
+ /* dbus1 doesn't allow strings over 32bit, let's enforce this
+ * globally, to not risk convertability */
l = strlen(s);
if (l > (size_t) (uint32_t) -1)
return -EINVAL;
- /* field id byte + signature length + signature 's' + NUL + string length + string + NUL */
- p = message_extend_fields(m, 8, 4 + 4 + l + 1);
- if (!p)
- return -ENOMEM;
+ /* Signature "(yv)" where the variant contains "s" */
- p[0] = h;
- p[1] = 1;
- p[2] = type;
- p[3] = 0;
+ if (m->is_gvariant) {
- ((uint32_t*) p)[1] = l;
- memcpy(p + 8, s, l + 1);
+ /* (field id byte + 7x padding, ((string + NUL) + NUL + signature string 's') */
+ p = message_extend_fields(m, 8, 1 + 7 + l + 1 + 1 + 1, true);
+ if (!p)
+ return -ENOMEM;
- if (ret)
- *ret = (char*) p + 8;
+ p[0] = h;
+ memset(p+1, 0, 7);
+ memcpy(p+8, s, l);
+ p[8+l] = 0;
+ p[8+l+1] = 0;
+ p[8+l+2] = type;
+
+ if (ret)
+ *ret = (char*) p + 1;
+
+ } else {
+ /* (field id byte + (signature length + signature 's' + NUL) + (string length + string + NUL)) */
+ p = message_extend_fields(m, 8, 4 + 4 + l + 1, false);
+ if (!p)
+ return -ENOMEM;
+
+ p[0] = h;
+ p[1] = 1;
+ p[2] = type;
+ p[3] = 0;
+
+ ((uint32_t*) p)[1] = l;
+ memcpy(p + 8, s, l + 1);
+
+ if (ret)
+ *ret = (char*) p + 8;
+ }
return 0;
}
assert(m);
+ /* dbus1 doesn't allow signatures over 32bit, let's enforce
+ * this globally, to not risk convertability */
l = strlen(s);
if (l > 255)
return -EINVAL;
- /* field id byte + signature length + signature 'g' + NUL + string length + string + NUL */
- p = message_extend_fields(m, 8, 4 + 1 + l + 1);
- if (!p)
- return -ENOMEM;
+ /* Signature "(yv)" where the variant contains "g" */
- p[0] = h;
- p[1] = 1;
- p[2] = SD_BUS_TYPE_SIGNATURE;
- p[3] = 0;
- p[4] = l;
- memcpy(p + 5, s, l + 1);
+ if (m->is_gvariant)
+ /* For gvariant the serialization is the same as for normal strings */
+ return message_append_field_string(m, h, 'g', s, ret);
+ else {
+ /* (field id byte + (signature length + signature 'g' + NUL) + (string length + string + NUL)) */
+ p = message_extend_fields(m, 8, 4 + 1 + l + 1, false);
+ if (!p)
+ return -ENOMEM;
- if (ret)
- *ret = (const char*) p + 5;
+ p[0] = h;
+ p[1] = 1;
+ p[2] = SD_BUS_TYPE_SIGNATURE;
+ p[3] = 0;
+ p[4] = l;
+ memcpy(p + 5, s, l + 1);
+
+ if (ret)
+ *ret = (const char*) p + 5;
+ }
return 0;
}
assert(m);
- /* field id byte + signature length + signature 'u' + NUL + value */
- p = message_extend_fields(m, 8, 4 + 4);
- if (!p)
- return -ENOMEM;
+ if (m->is_gvariant) {
+ /* (field id byte + 7x padding + ((value + NUL + signature string 'u') */
+
+ p = message_extend_fields(m, 8, 1 + 7 + 4 + 1 + 1, true);
+ if (!p)
+ return -ENOMEM;
+
+ p[0] = h;
+ memset(p+1, 0, 7);
+ *((uint32_t*) (p + 8)) = x;
+ p[12] = 0;
+ p[13] = 'u';
+ } else {
+ /* (field id byte + (signature length + signature 'u' + NUL) + value) */
+ p = message_extend_fields(m, 8, 4 + 4, false);
+ if (!p)
+ return -ENOMEM;
- p[0] = h;
- p[1] = 1;
- p[2] = SD_BUS_TYPE_UINT32;
- p[3] = 0;
+ p[0] = h;
+ p[1] = 1;
+ p[2] = SD_BUS_TYPE_UINT32;
+ p[3] = 0;
- ((uint32_t*) p)[1] = x;
+ ((uint32_t*) p)[1] = x;
+ }
return 0;
}
m->header->type = type;
m->header->version = bus ? bus->message_version : 1;
m->allow_fds = !bus || bus->can_fds || (bus->state != BUS_HELLO && bus->state != BUS_RUNNING);
+ m->root_container.need_offsets = m->is_gvariant = bus ? bus->use_gvariant : false;
if (bus)
m->bus = sd_bus_ref(bus);
return 0;
}
+static int message_add_offset(sd_bus_message *m, size_t offset) {
+ struct bus_container *c;
+
+ assert(m);
+ assert(m->is_gvariant);
+
+ /* Add offset to current container, unless this is the first
+ * item in it, which will have the 0 offset, which we can
+ * ignore. */
+ c = message_get_container(m);
+
+ if (!c->need_offsets)
+ return 0;
+
+ if (!GREEDY_REALLOC(c->offsets, c->n_allocated, c->n_offsets + 1))
+ return -ENOMEM;
+
+ c->offsets[c->n_offsets++] = offset;
+ return 0;
+}
+
static void message_extend_containers(sd_bus_message *m, size_t expand) {
struct bus_container *c;
return;
/* Update counters */
- for (c = m->containers; c < m->containers + m->n_containers; c++)
+ for (c = m->containers; c < m->containers + m->n_containers; c++) {
+
if (c->array_size)
*c->array_size += expand;
+ }
}
-static void *message_extend_body(sd_bus_message *m, size_t align, size_t sz) {
+static void *message_extend_body(sd_bus_message *m, size_t align, size_t sz, bool add_offset) {
struct bus_body_part *part = NULL;
size_t start_body, end_body, padding, start_part, end_part, added;
bool add_new_part;
m->header->body_size = end_body;
message_extend_containers(m, added);
+ if (add_offset) {
+ r = message_add_offset(m, end_body);
+ if (r < 0) {
+ m->poisoned = true;
+ return NULL;
+ }
+ }
+
return p;
}
+static int message_push_fd(sd_bus_message *m, int fd) {
+ int *f, copy;
+
+ assert(m);
+
+ if (fd < 0)
+ return -EINVAL;
+
+ if (!m->allow_fds)
+ return -ENOTSUP;
+
+ copy = fcntl(fd, F_DUPFD_CLOEXEC, 3);
+ if (copy < 0)
+ return -errno;
+
+ f = realloc(m->fds, sizeof(int) * (m->n_fds + 1));
+ if (!f) {
+ m->poisoned = true;
+ close_nointr_nofail(copy);
+ return -ENOMEM;
+ }
+
+ m->fds = f;
+ m->fds[m->n_fds] = copy;
+ m->free_fds = true;
+
+ return copy;
+}
+
int message_append_basic(sd_bus_message *m, char type, const void *p, const void **stored) {
+ _cleanup_close_ int fd = -1;
struct bus_container *c;
ssize_t align, sz;
- uint32_t k;
void *a;
- int fd = -1;
- uint32_t fdi = 0;
- int r;
assert_return(m, -EINVAL);
assert_return(!m->sealed, -EPERM);
}
}
- switch (type) {
+ if (m->is_gvariant) {
+ uint8_t u8;
+ uint32_t u32;
- case SD_BUS_TYPE_STRING:
- /* To make things easy we'll serialize a NULL string
- * into the empty string */
- p = strempty(p);
+ switch (type) {
- /* Fall through... */
- case SD_BUS_TYPE_OBJECT_PATH:
+ case SD_BUS_TYPE_SIGNATURE:
+ case SD_BUS_TYPE_STRING:
+ p = strempty(p);
- if (!p) {
- r = -EINVAL;
- goto fail;
- }
+ /* Fall through... */
+ case SD_BUS_TYPE_OBJECT_PATH:
+ if (!p)
+ return -EINVAL;
- align = 4;
- sz = 4 + strlen(p) + 1;
- break;
+ align = 1;
+ sz = strlen(p) + 1;
+ break;
- case SD_BUS_TYPE_SIGNATURE:
+ case SD_BUS_TYPE_BOOLEAN:
- if (!p) {
- r = -EINVAL;
- goto fail;
- }
+ u8 = p && *(int*) p;
+ p = &u8;
- align = 1;
- sz = 1 + strlen(p) + 1;
- break;
+ align = sz = 1;
+ break;
- case SD_BUS_TYPE_BOOLEAN:
+ case SD_BUS_TYPE_UNIX_FD:
- if (!p) {
- r = -EINVAL;
- goto fail;
- }
+ if (!p)
+ return -EINVAL;
- align = sz = 4;
+ fd = message_push_fd(m, *(int*) p);
+ if (fd < 0)
+ return fd;
- assert_cc(sizeof(int) == sizeof(uint32_t));
- memcpy(&k, p, 4);
- k = !!k;
- p = &k;
- break;
+ u32 = m->n_fds;
+ p = &u32;
- case SD_BUS_TYPE_UNIX_FD: {
- int z, *f;
+ align = sz = 4;
+ break;
- if (!p) {
- r = -EINVAL;
- goto fail;
+ default:
+ align = bus_gvariant_get_alignment(CHAR_TO_STR(type));
+ sz = bus_gvariant_get_size(type);
+ break;
}
- if (!m->allow_fds) {
- r = -ENOTSUP;
- goto fail;
- }
+ assert(align > 0);
+ assert(sz > 0);
- align = sz = 4;
+ a = message_extend_body(m, align, sz, true);
+ if (!a)
+ return -ENOMEM;
- z = *(int*) p;
- if (z < 0) {
- r = -EINVAL;
- goto fail;
- }
+ memcpy(a, p, sz);
- fd = fcntl(z, F_DUPFD_CLOEXEC, 3);
- if (fd < 0) {
- r = -errno;
- goto fail;
- }
+ if (stored)
+ *stored = (const uint8_t*) a;
- f = realloc(m->fds, sizeof(int) * (m->n_fds + 1));
- if (!f) {
- m->poisoned = true;
- r = -ENOMEM;
- goto fail;
- }
+ } else {
+ uint32_t u32;
- fdi = m->n_fds;
- f[fdi] = fd;
- m->fds = f;
- m->free_fds = true;
- break;
- }
+ switch (type) {
- default:
- if (!p) {
- r = -EINVAL;
- goto fail;
- }
+ case SD_BUS_TYPE_STRING:
+ /* To make things easy we'll serialize a NULL string
+ * into the empty string */
+ p = strempty(p);
- align = bus_type_get_alignment(type);
- sz = bus_type_get_size(type);
- break;
- }
+ /* Fall through... */
+ case SD_BUS_TYPE_OBJECT_PATH:
- assert(align > 0);
- assert(sz > 0);
+ if (!p)
+ return -EINVAL;
- a = message_extend_body(m, align, sz);
- if (!a) {
- r = -ENOMEM;
- goto fail;
- }
+ align = 4;
+ sz = 4 + strlen(p) + 1;
+ break;
- if (type == SD_BUS_TYPE_STRING || type == SD_BUS_TYPE_OBJECT_PATH) {
- *(uint32_t*) a = sz - 5;
- memcpy((uint8_t*) a + 4, p, sz - 4);
+ case SD_BUS_TYPE_SIGNATURE:
- if (stored)
- *stored = (const uint8_t*) a + 4;
+ p = strempty(p);
- } else if (type == SD_BUS_TYPE_SIGNATURE) {
- *(uint8_t*) a = sz - 1;
- memcpy((uint8_t*) a + 1, p, sz - 1);
+ align = 1;
+ sz = 1 + strlen(p) + 1;
+ break;
- if (stored)
- *stored = (const uint8_t*) a + 1;
- } else if (type == SD_BUS_TYPE_UNIX_FD) {
- *(uint32_t*) a = fdi;
+ case SD_BUS_TYPE_BOOLEAN:
- if (stored)
- *stored = a;
+ u32 = p && *(int*) p;
+ align = sz = 4;
+ break;
- m->n_fds ++;
+ case SD_BUS_TYPE_UNIX_FD:
- } else {
- memcpy(a, p, sz);
+ if (!p)
+ return -EINVAL;
- if (stored)
- *stored = a;
+ fd = message_push_fd(m, *(int*) p);
+ if (fd < 0)
+ return fd;
+
+ u32 = m->n_fds;
+ p = &u32;
+
+ align = sz = 4;
+ break;
+
+ default:
+ align = bus_type_get_alignment(type);
+ sz = bus_type_get_size(type);
+ break;
+ }
+
+ assert(align > 0);
+ assert(sz > 0);
+
+ a = message_extend_body(m, align, sz, false);
+ if (!a)
+ return -ENOMEM;
+
+ if (type == SD_BUS_TYPE_STRING || type == SD_BUS_TYPE_OBJECT_PATH) {
+ *(uint32_t*) a = sz - 5;
+ memcpy((uint8_t*) a + 4, p, sz - 4);
+
+ if (stored)
+ *stored = (const uint8_t*) a + 4;
+
+ } else if (type == SD_BUS_TYPE_SIGNATURE) {
+ *(uint8_t*) a = sz - 1;
+ memcpy((uint8_t*) a + 1, p, sz - 1);
+
+ if (stored)
+ *stored = (const uint8_t*) a + 1;
+ } else {
+ memcpy(a, p, sz);
+
+ if (stored)
+ *stored = a;
+ }
}
+ if (type == SD_BUS_TYPE_UNIX_FD)
+ m->n_fds ++;
+
if (c->enclosing != SD_BUS_TYPE_ARRAY)
c->index++;
+ fd = -1;
return 0;
-
-fail:
- if (fd >= 0)
- close_nointr_nofail(fd);
-
- return r;
}
_public_ int sd_bus_message_append_basic(sd_bus_message *m, char type, const void *p) {
}
}
- a = message_extend_body(m, 4, 4 + size + 1);
- if (!a)
- return -ENOMEM;
+ if (m->is_gvariant) {
+ a = message_extend_body(m, 1, size + 1, true);
+ if (!a)
+ return -ENOMEM;
+
+ *s = a;
+ } else {
+ a = message_extend_body(m, 4, 4 + size + 1, false);
+ if (!a)
+ return -ENOMEM;
- *(uint32_t*) a = size;
- *s = (char*) a + 4;
+ *(uint32_t*) a = size;
+ *s = (char*) a + 4;
+ }
(*s)[size] = 0;
sd_bus_message *m,
struct bus_container *c,
const char *contents,
- uint32_t **array_size) {
+ uint32_t **array_size,
+ size_t *begin,
+ bool *need_offsets) {
unsigned nindex;
- void *a, *op;
- int alignment;
- size_t os;
- struct bus_body_part *o;
+ int alignment, r;
assert(m);
assert(c);
assert(contents);
assert(array_size);
+ assert(begin);
+ assert(need_offsets);
if (!signature_is_single(contents, true))
return -EINVAL;
- alignment = bus_type_get_alignment(contents[0]);
- if (alignment < 0)
- return alignment;
-
if (c->signature && c->signature[c->index]) {
/* Verify the existing signature */
nindex = e - c->signature;
}
- a = message_extend_body(m, 4, 4);
- if (!a)
- return -ENOMEM;
+ if (m->is_gvariant) {
+ alignment = bus_gvariant_get_alignment(contents);
+ if (alignment < 0)
+ return alignment;
- o = m->body_end;
- op = m->body_end->data;
- os = m->body_end->size;
+ /* Add alignment padding and add to offset list */
+ if (!message_extend_body(m, alignment, 0, false))
+ return -ENOMEM;
- /* Add alignment between size and first element */
- if (!message_extend_body(m, alignment, 0))
- return -ENOMEM;
+ r = bus_gvariant_is_fixed_size(contents);
+ if (r < 0)
+ return r;
+
+ *begin = m->header->body_size;
+ *need_offsets = r == 0;
+ } else {
+ void *a, *op;
+ size_t os;
+ struct bus_body_part *o;
+
+ alignment = bus_type_get_alignment(contents[0]);
+ if (alignment < 0)
+ return alignment;
+
+ a = message_extend_body(m, 4, 4, false);
+ if (!a)
+ return -ENOMEM;
+
+ o = m->body_end;
+ op = m->body_end->data;
+ os = m->body_end->size;
+
+ /* Add alignment between size and first element */
+ if (!message_extend_body(m, alignment, 0, false))
+ return -ENOMEM;
+
+ /* location of array size might have changed so let's readjust a */
+ if (o == m->body_end)
+ a = adjust_pointer(a, op, os, m->body_end->data);
+
+ *(uint32_t*) a = 0;
+ *array_size = a;
+ }
if (c->enclosing != SD_BUS_TYPE_ARRAY)
c->index = nindex;
- /* location of array size might have changed so let's readjust a */
- if (o == m->body_end)
- a = adjust_pointer(a, op, os, m->body_end->data);
-
- *(uint32_t*) a = 0;
- *array_size = a;
return 0;
}
struct bus_container *c,
const char *contents) {
- size_t l;
- void *a;
-
assert(m);
assert(c);
assert(contents);
}
}
- l = strlen(contents);
- a = message_extend_body(m, 1, 1 + l + 1);
- if (!a)
- return -ENOMEM;
+ if (m->is_gvariant) {
+ /* Variants are always aligned to 8 */
+
+ if (!message_extend_body(m, 8, 0, false))
+ return -ENOMEM;
+
+ } else {
+ size_t l;
+ void *a;
+
+ l = strlen(contents);
+ a = message_extend_body(m, 1, 1 + l + 1, false);
+ if (!a)
+ return -ENOMEM;
- *(uint8_t*) a = l;
- memcpy((uint8_t*) a + 1, contents, l + 1);
+ *(uint8_t*) a = l;
+ memcpy((uint8_t*) a + 1, contents, l + 1);
+ }
if (c->enclosing != SD_BUS_TYPE_ARRAY)
c->index++;
static int bus_message_open_struct(
sd_bus_message *m,
struct bus_container *c,
- const char *contents) {
+ const char *contents,
+ size_t *begin,
+ bool *need_offsets) {
size_t nindex;
+ int r;
assert(m);
assert(c);
assert(contents);
+ assert(begin);
+ assert(need_offsets);
if (!signature_is_valid(contents, false))
return -EINVAL;
nindex = e - c->signature;
}
- /* Align contents to 8 byte boundary */
- if (!message_extend_body(m, 8, 0))
- return -ENOMEM;
+ if (m->is_gvariant) {
+ int alignment;
+
+ alignment = bus_gvariant_get_alignment(contents);
+ if (alignment < 0)
+ return alignment;
+
+ if (!message_extend_body(m, alignment, 0, false))
+ return -ENOMEM;
+
+ r = bus_gvariant_is_fixed_size(contents);
+ if (r < 0)
+ return r;
+
+ *begin = m->header->body_size;
+ *need_offsets = r == 0;
+ } else {
+ /* Align contents to 8 byte boundary */
+ if (!message_extend_body(m, 8, 0, false))
+ return -ENOMEM;
+ }
if (c->enclosing != SD_BUS_TYPE_ARRAY)
c->index = nindex;
static int bus_message_open_dict_entry(
sd_bus_message *m,
struct bus_container *c,
- const char *contents) {
+ const char *contents,
+ size_t *begin,
+ bool *need_offsets) {
- size_t nindex;
+ int r;
assert(m);
assert(c);
assert(contents);
+ assert(begin);
+ assert(need_offsets);
if (!signature_is_pair(contents))
return -EINVAL;
!startswith(c->signature + c->index + 1, contents) ||
c->signature[c->index + 1 + l] != SD_BUS_TYPE_DICT_ENTRY_END)
return -ENXIO;
-
- nindex = c->index + 1 + l + 1;
} else
return -ENXIO;
- /* Align contents to 8 byte boundary */
- if (!message_extend_body(m, 8, 0))
- return -ENOMEM;
+ if (m->is_gvariant) {
+ int alignment;
- if (c->enclosing != SD_BUS_TYPE_ARRAY)
- c->index = nindex;
+ alignment = bus_gvariant_get_alignment(contents);
+ if (alignment < 0)
+ return alignment;
+
+ if (!message_extend_body(m, alignment, 0, false))
+ return -ENOMEM;
+
+ r = bus_gvariant_is_fixed_size(contents);
+ if (r < 0)
+ return r;
+
+ *begin = m->header->body_size;
+ *need_offsets = r == 0;
+ } else {
+ /* Align contents to 8 byte boundary */
+ if (!message_extend_body(m, 8, 0, false))
+ return -ENOMEM;
+ }
return 0;
}
struct bus_container *c, *w;
uint32_t *array_size = NULL;
char *signature;
- size_t before;
+ size_t before, begin;
+ bool need_offsets = false;
int r;
assert_return(m, -EINVAL);
before = m->header->body_size;
if (type == SD_BUS_TYPE_ARRAY)
- r = bus_message_open_array(m, c, contents, &array_size);
+ r = bus_message_open_array(m, c, contents, &array_size, &begin, &need_offsets);
else if (type == SD_BUS_TYPE_VARIANT)
r = bus_message_open_variant(m, c, contents);
else if (type == SD_BUS_TYPE_STRUCT)
- r = bus_message_open_struct(m, c, contents);
+ r = bus_message_open_struct(m, c, contents, &begin, &need_offsets);
else if (type == SD_BUS_TYPE_DICT_ENTRY)
- r = bus_message_open_dict_entry(m, c, contents);
+ r = bus_message_open_dict_entry(m, c, contents, &begin, &need_offsets);
else
r = -EINVAL;
w->index = 0;
w->array_size = array_size;
w->before = before;
- w->begin = m->rindex;
+ w->begin = begin;
+ w->n_offsets = w->n_allocated = 0;
+ w->offsets = NULL;
+ w->need_offsets = need_offsets;
+
+ return 0;
+}
+
+static int bus_message_close_array(sd_bus_message *m, struct bus_container *c) {
+
+ assert(m);
+ assert(c);
+
+ if (!m->is_gvariant)
+ return 0;
+
+ if (c->need_offsets) {
+ uint8_t *a;
+ unsigned i;
+ size_t sz;
+
+ /* Variable-width arrays */
+
+ sz = c->n_offsets > 0 ? c->offsets[c->n_offsets-1] - c->begin : 0;
+ if (sz + c->n_offsets <= 0xFF) {
+ a = message_extend_body(m, 1, c->n_offsets, true);
+ if (!a)
+ return -ENOMEM;
+
+ for (i = 0; i < c->n_offsets; i++)
+ a[i] = (uint8_t) (c->offsets[i] - c->begin);
+
+ } else if (sz + c->n_offsets*2 <= 0xFFFF) {
+ a = message_extend_body(m, 1, c->n_offsets * 2, true);
+ if (!a)
+ return -ENOMEM;
+
+ for (i = 0; i < c->n_offsets; i++) {
+ uint16_t x = htole16((uint16_t) (c->offsets[i] - c->begin));
+ memcpy(a + (i*2), &x, 2);
+ }
+
+ } else if (sz + c->n_offsets*4 <= 0xFFFFFFFF) {
+ a = message_extend_body(m, 1, c->n_offsets * 4, true);
+ if (!a)
+ return -ENOMEM;
+
+ for (i = 0; i < c->n_offsets; i++) {
+ uint32_t x = htole32((uint32_t) (c->offsets[i] - c->begin));
+ memcpy(a + (i*4), &x, 4);
+ }
+ } else {
+ a = message_extend_body(m, 1, c->n_offsets * 8, true);
+ if (!a)
+ return -ENOMEM;
+
+ for (i = 0; i < c->n_offsets; i++) {
+ uint64_t x = htole64((uint64_t) (c->offsets[i] - c->begin));
+ memcpy(a + (i*8), &x, 8);
+ }
+ }
+
+ } else {
+ void *a;
+
+ /* Fixed-width or empty arrays */
+
+ a = message_extend_body(m, 1, 0, true); /* let's add offset to parent */
+ if (!a)
+ return -ENOMEM;
+ }
+
+ return 0;
+}
+
+static int bus_message_close_variant(sd_bus_message *m, struct bus_container *c) {
+ uint8_t *a;
+ size_t l;
+
+ assert(m);
+ assert(c);
+
+ if (!m->is_gvariant)
+ return 0;
+
+ l = strlen(c->signature);
+
+ a = message_extend_body(m, 1, 1 + l, true);
+ if (!a)
+ return -ENOMEM;
+
+ a[0] = 0;
+ memcpy(a+1, c->signature, l);
+
+ return 0;
+}
+
+static int bus_message_close_struct(sd_bus_message *m, struct bus_container *c, bool add_offset) {
+ size_t n_variable = 0;
+ unsigned i = 0;
+ const char *p;
+ uint8_t *a;
+ int r;
+
+ assert(m);
+ assert(c);
+
+ if (!m->is_gvariant)
+ return 0;
+
+ p = c->signature;
+ while (*p != 0) {
+ size_t n;
+
+ r = signature_element_length(p, &n);
+ if (r < 0)
+ return r;
+ else {
+ char t[n+1];
+
+ memcpy(t, p, n);
+ t[n] = 0;
+
+ r = bus_gvariant_is_fixed_size(t);
+ if (r < 0)
+ return r;
+ }
+
+ assert(i <= c->n_offsets);
+
+ /* We need to add an offset for each item that has a
+ * variable size and that is not the last one in the
+ * list */
+ if (r == 0 && p[n] != 0)
+ n_variable++;
+ else
+ c->offsets[i] = (size_t) -1;
+
+ i++;
+ p += n;
+ }
+
+ if (n_variable <= 0) {
+ a = message_extend_body(m, 1, 0, true);
+ if (!a)
+ return -ENOMEM;
+ } else {
+ size_t sz, z;
+ unsigned j;
+
+ assert(c->offsets[c->n_offsets-1] == m->header->body_size ||
+ c->offsets[c->n_offsets-1] == (size_t) -1);
+
+ sz = m->header->body_size - c->begin;
+ if (sz + n_variable <= 0xFF)
+ z = 1;
+ else if (sz + (n_variable)*2 <= 0xFFFF)
+ z = 2;
+ else if (sz + (n_variable)*4 <= 0xFFFFFFFF)
+ z = 4;
+ else
+ z = 8;
+
+ a = message_extend_body(m, 1, z * n_variable, add_offset);
+ if (!a)
+ return -ENOMEM;
+
+ for (i = 0, j = 0; i < c->n_offsets; i++) {
+ size_t v;
+ unsigned k;
+
+ if (c->offsets[i] == (size_t) -1)
+ continue;
+
+ v = c->offsets[i] - c->begin;
+ k = n_variable - 1 - j;
+
+ if (z == 1)
+ ((uint8_t*) a)[k] = (uint8_t) v;
+ else if (z == 2) {
+ uint16_t x = htole16((uint16_t) v);
+ memcpy(a + k * 2, &x, 2);
+ } else if (z == 4) {
+ uint32_t x = htole32((uint32_t) v);
+ memcpy(a + k * 4, &x, 4);
+ } else if (z == 8) {
+ uint64_t x = htole64((uint64_t) v);
+ memcpy(a + k * 8, &x, 8);
+ } else
+ assert_not_reached("Wrong offset width");
+
+ j++;
+ }
+ }
return 0;
}
_public_ int sd_bus_message_close_container(sd_bus_message *m) {
struct bus_container *c;
+ int r;
assert_return(m, -EINVAL);
assert_return(!m->sealed, -EPERM);
assert_return(!m->poisoned, -ESTALE);
c = message_get_container(m);
+
if (c->enclosing != SD_BUS_TYPE_ARRAY)
if (c->signature && c->signature[c->index] != 0)
return -EINVAL;
- free(c->signature);
m->n_containers--;
- return 0;
+ if (c->enclosing == SD_BUS_TYPE_ARRAY)
+ r = bus_message_close_array(m, c);
+ else if (c->enclosing == SD_BUS_TYPE_VARIANT)
+ r = bus_message_close_variant(m, c);
+ else if (c->enclosing == SD_BUS_TYPE_STRUCT || c->enclosing == SD_BUS_TYPE_DICT_ENTRY)
+ r = bus_message_close_struct(m, c, true);
+ else
+ assert_not_reached("Unknown container type");
+
+ free(c->signature);
+ return r;
}
typedef struct {
return r;
}
-_public_ int sd_bus_message_append_array_space(sd_bus_message *m,
- char type,
- size_t size,
- void **ptr) {
+_public_ int sd_bus_message_append_array_space(
+ sd_bus_message *m,
+ char type,
+ size_t size,
+ void **ptr) {
+
ssize_t align, sz;
void *a;
int r;
if (r < 0)
return r;
- a = message_extend_body(m, align, size);
+ a = message_extend_body(m, align, size, false);
if (!a)
return -ENOMEM;
if (r < 0)
return r;
- a = message_extend_body(m, align, 0);
+ a = message_extend_body(m, align, 0, false);
if (!a)
return -ENOMEM;
}
}
- a = message_extend_body(m, 4, 4);
- if (!a)
- return -ENOMEM;
+ if (!m->is_gvariant) {
+ a = message_extend_body(m, 4, 4, false);
+ if (!a)
+ return -ENOMEM;
- *(uint32_t*) a = size - 1;
+ *(uint32_t*) a = size - 1;
+ }
part = message_append_part(m);
if (!part)
part->size = size;
copy_fd = -1;
- message_extend_containers(m, size);
m->header->body_size += size;
+ message_extend_containers(m, size);
+
+ if (m->is_gvariant) {
+ r = message_add_offset(m, m->header->body_size);
+ if (r < 0) {
+ m->poisoned = true;
+ return -ENOMEM;
+ }
+ }
if (c->enclosing != SD_BUS_TYPE_ARRAY)
c->index++;
return 0;
}
+static int bus_message_close_header(sd_bus_message *m) {
+ uint8_t *a;
+ size_t z, i;
+
+ assert(m);
+
+ if (!m->is_gvariant)
+ return 0;
+
+ if (m->n_header_offsets <= 1)
+ return 0;
+
+ assert(m->header->fields_size == m->header_offsets[m->n_header_offsets-1]);
+
+ if (m->header->fields_size + m->n_header_offsets <= 0xFF)
+ z = 1;
+ else if (m->header->fields_size + 2*m->n_header_offsets <= 0xFFFF)
+ z = 2;
+ else if (m->header->fields_size + 4*m->n_header_offsets <= 0xFFFFFFFF)
+ z = 4;
+ else
+ z = 8;
+
+ a = message_extend_fields(m, 1, z * m->n_header_offsets, false);
+ if (!a)
+ return -ENOMEM;
+
+ for (i = 0; i < m->n_header_offsets; i++) {
+ if (z == 1)
+ ((uint8_t*) a)[i] = (uint8_t) m->header_offsets[i];
+ else if (z == 2) {
+ uint16_t x = htole16((uint16_t) m->header_offsets[i]);
+ memcpy(a + 2*i, &x, 2);
+ } else if (z == 4) {
+ uint32_t x = htole32((uint32_t) m->header_offsets[i]);
+ memcpy(a + 4*i, &x, 4);
+ } else if (z == 8) {
+ uint64_t x = htole64((uint64_t) m->header_offsets[i]);
+ memcpy(a + 8*i, &x, 8);
+ } else
+ assert_not_reached("unknown type");
+ }
+
+ return 0;
+}
+
int bus_message_seal(sd_bus_message *m, uint64_t serial) {
struct bus_body_part *part;
size_t l, a;
!streq(strempty(m->root_container.signature), m->enforced_reply_signature))
return -ENOMSG;
+ /* If gvariant marshalling is used we need to close the body structure */
+ r = bus_message_close_struct(m, &m->root_container, false);
+ if (r < 0)
+ return r;
+
/* If there's a non-trivial signature set, then add it in here */
if (!isempty(m->root_container.signature)) {
r = message_append_field_signature(m, BUS_MESSAGE_HEADER_SIGNATURE, m->root_container.signature, NULL);
return r;
}
+ r = bus_message_close_header(m);
+ if (r < 0)
+ return r;
+
/* Add padding at the end of the fields part, since we know
* the body needs to start at an 8 byte alignment. We made
* sure we allocated enough space for this, so all we need to
~ianmdlvl / elogind.git / blobdiff